diff options
Diffstat (limited to 'src/vnet')
| -rw-r--r-- | src/vnet/ethernet/arp.c | 83 | ||||
| -rw-r--r-- | src/vnet/ethernet/arp_packet.h | 9 | ||||
| -rw-r--r-- | src/vnet/ip/ip6.h | 2 | ||||
| -rw-r--r-- | src/vnet/ip/ip6_neighbor.c | 53 |
4 files changed, 147 insertions, 0 deletions
diff --git a/src/vnet/ethernet/arp.c b/src/vnet/ethernet/arp.c index d5dc9cceb39..df68175055e 100644 --- a/src/vnet/ethernet/arp.c +++ b/src/vnet/ethernet/arp.c @@ -110,6 +110,9 @@ typedef struct static const u8 vrrp_prefix[] = { 0x00, 0x00, 0x5E, 0x00, 0x01 }; +/* Node index for send_garp_na_process */ +u32 send_garp_na_process_node_index; + static void set_ip4_over_ethernet_rpc_callback (vnet_arp_set_ip4_over_ethernet_rpc_args_t * a); @@ -2378,6 +2381,86 @@ ethernet_arp_change_mac (u32 sw_if_index) /* *INDENT-ON* */ } +void static +send_ip4_garp (vlib_main_t * vm, vnet_hw_interface_t * hi) +{ + ip4_main_t *i4m = &ip4_main; + u32 sw_if_index = hi->sw_if_index; + ip4_address_t *ip4_addr = ip4_interface_first_address (i4m, sw_if_index, 0); + + if (ip4_addr) + { + clib_warning ("Sending GARP for IP4 address %U on sw_if_idex %d", + format_ip4_address, ip4_addr, sw_if_index); + + /* Form GARP packet for output - Gratuitous ARP is an ARP request packet + where the interface IP/MAC pair is used for both source and request + MAC/IP pairs in the request */ + u32 bi = 0; + ethernet_arp_header_t *h = vlib_packet_template_get_packet + (vm, &i4m->ip4_arp_request_packet_template, &bi); + clib_memcpy (h->ip4_over_ethernet[0].ethernet, hi->hw_address, + sizeof (h->ip4_over_ethernet[0].ethernet)); + clib_memcpy (h->ip4_over_ethernet[1].ethernet, hi->hw_address, + sizeof (h->ip4_over_ethernet[1].ethernet)); + h->ip4_over_ethernet[0].ip4 = ip4_addr[0]; + h->ip4_over_ethernet[1].ip4 = ip4_addr[0]; + + /* Setup MAC header with ARP Etype and broadcast DMAC */ + vlib_buffer_t *b = vlib_get_buffer (vm, bi); + vlib_buffer_advance (b, -sizeof (ethernet_header_t)); + ethernet_header_t *e = vlib_buffer_get_current (b); + e->type = clib_host_to_net_u16 (ETHERNET_TYPE_ARP); + clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address)); + memset (e->dst_address, 0xff, sizeof (e->dst_address)); + + /* Send GARP packet out the specified interface */ + vnet_buffer (b)->sw_if_index[VLIB_RX] = + vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index; + vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); + u32 *to_next = vlib_frame_vector_args (f); + to_next[0] = bi; + f->n_vectors = 1; + vlib_put_frame_to_node (vm, hi->output_node_index, f); + } +} + +static vlib_node_registration_t send_garp_na_proc_node; + +static uword +send_garp_na_process (vlib_main_t * vm, + vlib_node_runtime_t * rt, vlib_frame_t * f) +{ + vnet_main_t *vnm = vnet_get_main (); + uword event_type, *event_data = 0; + + send_garp_na_process_node_index = send_garp_na_proc_node.index; + + while (1) + { + vlib_process_wait_for_event (vm); + event_type = vlib_process_get_events (vm, &event_data); + if ((event_type == SEND_GARP_NA) && (vec_len (event_data) >= 1)) + { + u32 hw_if_index = event_data[0]; + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); + send_ip4_garp (vm, hi); + send_ip6_na (vm, hi); + } + vec_reset_length (event_data); + } + return 0; +} + + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (send_garp_na_proc_node, static) = { + .function = send_garp_na_process, + .type = VLIB_NODE_TYPE_PROCESS, + .name = "send-garp-na-process", +}; +/* *INDENT-ON* */ + /* * fd.io coding-style-patch-verification: ON * diff --git a/src/vnet/ethernet/arp_packet.h b/src/vnet/ethernet/arp_packet.h index 17e64f43049..d740b844e12 100644 --- a/src/vnet/ethernet/arp_packet.h +++ b/src/vnet/ethernet/arp_packet.h @@ -167,6 +167,15 @@ typedef struct ethernet_arp_ip4_entry_t *ip4_neighbor_entries (u32 sw_if_index); u8 *format_ethernet_arp_ip4_entry (u8 * s, va_list * va); +/* Node index for send_garp_na_process */ +extern u32 send_garp_na_process_node_index; + +/* Even type for send_garp_na_process */ +enum +{ + SEND_GARP_NA = 1, +} dpdk_send_garp_na_process_event_t; + #endif /* included_ethernet_arp_packet_h */ /* diff --git a/src/vnet/ip/ip6.h b/src/vnet/ip/ip6.h index d623c95f52f..cf52994e720 100644 --- a/src/vnet/ip/ip6.h +++ b/src/vnet/ip/ip6.h @@ -375,6 +375,8 @@ int vnet_ip6_nd_term (vlib_main_t * vm, ethernet_header_t * eth, ip6_header_t * ip, u32 sw_if_index, u16 bd_index); +void send_ip6_na (vlib_main_t * vm, vnet_hw_interface_t * hi); + u8 *format_ip6_forward_next_trace (u8 * s, va_list * args); u32 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0); diff --git a/src/vnet/ip/ip6_neighbor.c b/src/vnet/ip/ip6_neighbor.c index ba7ea143318..b8f6f9b10e7 100644 --- a/src/vnet/ip/ip6_neighbor.c +++ b/src/vnet/ip/ip6_neighbor.c @@ -4192,6 +4192,59 @@ ethernet_ndp_change_mac (u32 sw_if_index) /* *INDENT-ON* */ } +void +send_ip6_na (vlib_main_t * vm, vnet_hw_interface_t * hi) +{ + ip6_main_t *i6m = &ip6_main; + u32 sw_if_index = hi->sw_if_index; + ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index); + if (ip6_addr) + { + clib_warning + ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d", + format_ip6_address, ip6_addr, sw_if_index); + + /* Form unsolicited neighbor advertisement packet from NS pkt template */ + int bogus_length; + u32 bi = 0; + icmp6_neighbor_solicitation_header_t *h = + vlib_packet_template_get_packet (vm, + &i6m->discover_neighbor_packet_template, + &bi); + ip6_set_reserved_multicast_address (&h->ip.dst_address, + IP6_MULTICAST_SCOPE_link_local, + IP6_MULTICAST_GROUP_ID_all_hosts); + h->ip.src_address = ip6_addr[0]; + h->neighbor.icmp.type = ICMP6_neighbor_advertisement; + h->neighbor.target_address = ip6_addr[0]; + h->neighbor.advertisement_flags = clib_host_to_net_u32 + (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE); + clib_memcpy (h->link_layer_option.ethernet_address, + hi->hw_address, vec_len (hi->hw_address)); + h->neighbor.icmp.checksum = + ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length); + ASSERT (bogus_length == 0); + + /* Setup MAC header with IP6 Etype and mcast DMAC */ + vlib_buffer_t *b = vlib_get_buffer (vm, bi); + vlib_buffer_advance (b, -sizeof (ethernet_header_t)); + ethernet_header_t *e = vlib_buffer_get_current (b); + e->type = clib_host_to_net_u16 (ETHERNET_TYPE_IP6); + clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address)); + ip6_multicast_ethernet_address (e->dst_address, + IP6_MULTICAST_GROUP_ID_all_hosts); + + /* Send unsolicited ND advertisement packet out the specified interface */ + vnet_buffer (b)->sw_if_index[VLIB_RX] = + vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index; + vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); + u32 *to_next = vlib_frame_vector_args (f); + to_next[0] = bi; + f->n_vectors = 1; + vlib_put_frame_to_node (vm, hi->output_node_index, f); + } +} + /* * fd.io coding-style-patch-verification: ON * |